content: /* Copyright (C) 2016-2018 Alibaba Group Holding Limited
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  
  // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package com.google.protobuf.util;
  
  import com.google.protobuf.Duration;
  import com.google.protobuf.Timestamp;
  import java.text.ParseException;
  import java.util.ArrayList;
  import java.util.List;
  import junit.framework.TestCase;
  import org.junit.Assert;
  
  /** Unit tests for {@link TimeUtil}. */
  public class TimeUtilTest extends TestCase {
    public void testTimestampStringFormat() throws Exception {
      Timestamp start = TimeUtil.parseTimestamp("0001-01-01T00:00:00Z");
      Timestamp end = TimeUtil.parseTimestamp("9999-12-31T23:59:59.999999999Z");
      assertEquals(TimeUtil.TIMESTAMP_SECONDS_MIN, start.getSeconds());
      assertEquals(0, start.getNanos());
      assertEquals(TimeUtil.TIMESTAMP_SECONDS_MAX, end.getSeconds());
      assertEquals(999999999, end.getNanos());
      assertEquals("0001-01-01T00:00:00Z", TimeUtil.toString(start));
      assertEquals("9999-12-31T23:59:59.999999999Z", TimeUtil.toString(end));
  
      Timestamp value = TimeUtil.parseTimestamp("1970-01-01T00:00:00Z");
      assertEquals(0, value.getSeconds());
      assertEquals(0, value.getNanos());
  
      // Test negative timestamps.
      value = TimeUtil.parseTimestamp("1969-12-31T23:59:59.999Z");
      assertEquals(-1, value.getSeconds());
      // Nano part is in the range of [0, 999999999] for Timestamp.
      assertEquals(999000000, value.getNanos());
  
      // Test that 3, 6, or 9 digits are used for the fractional part.
      value = Timestamp.newBuilder().setNanos(10).build();
      assertEquals("1970-01-01T00:00:00.000000010Z", TimeUtil.toString(value));
      value = Timestamp.newBuilder().setNanos(10000).build();
      assertEquals("1970-01-01T00:00:00.000010Z", TimeUtil.toString(value));
      value = Timestamp.newBuilder().setNanos(10000000).build();
      assertEquals("1970-01-01T00:00:00.010Z", TimeUtil.toString(value));
  
      // Test that parsing accepts timezone offsets.
      value = TimeUtil.parseTimestamp("1970-01-01T00:00:00.010+08:00");
      assertEquals("1969-12-31T16:00:00.010Z", TimeUtil.toString(value));
      value = TimeUtil.parseTimestamp("1970-01-01T00:00:00.010-08:00");
      assertEquals("1970-01-01T08:00:00.010Z", TimeUtil.toString(value));
    }
  
    private volatile boolean stopParsingThreads = false;
    private volatile String errorMessage = "";
  
    private class ParseTimestampThread extends Thread {
      private final String[] strings;
      private final Timestamp[] values;
  
      public ParseTimestampThread(String[] strings, Timestamp[] values) {
        this.strings = strings;
        this.values = values;
      }
  
      @Override
      public void run() {
        int index = 0;
        while (!stopParsingThreads) {
          Timestamp result;
          try {
            result = TimeUtil.parseTimestamp(strings[index]);
          } catch (ParseException e) {
            errorMessage = "Failed to parse timestamp: " + strings[index];
            break;
          }
          if (result.getSeconds() != values[index].getSeconds()
              || result.getNanos() != values[index].getNanos()) {
            errorMessage =
                "Actual result: " + result.toString() + ", expected: " + values[index].toString();
            break;
          }
          index = (index + 1) % strings.length;
        }
      }
    }
  
    public void testTimestampConcurrentParsing() throws Exception {
      String[] timestampStrings =
          new String[] {
            "0001-01-01T00:00:00Z",
            "9999-12-31T23:59:59.999999999Z",
            "1970-01-01T00:00:00Z",
            "1969-12-31T23:59:59.999Z",
          };
      Timestamp[] timestampValues = new Timestamp[timestampStrings.length];
      for (int i = 0; i < timestampStrings.length; i++) {
        timestampValues[i] = TimeUtil.parseTimestamp(timestampStrings[i]);
      }
  
      final int THREAD_COUNT = 16;
      final int RUNNING_TIME = 5000; // in milliseconds.
      final List<Thread> threads = new ArrayList<Thread>();
  
      stopParsingThreads = false;
      errorMessage = "";
      for (int i = 0; i < THREAD_COUNT; i++) {
        Thread thread = new ParseTimestampThread(timestampStrings, timestampValues);
        thread.start();
        threads.add(thread);
      }
      Thread.sleep(RUNNING_TIME);
      stopParsingThreads = true;
      for (Thread thread : threads) {
        thread.join();
      }
      Assert.assertEquals("", errorMessage);
    }
  
    public void testTimetampInvalidFormat() throws Exception {
      try {
        // Value too small.
        Timestamp value =
            Timestamp.newBuilder().setSeconds(TimeUtil.TIMESTAMP_SECONDS_MIN - 1).build();
        TimeUtil.toString(value);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      try {
        // Value too large.
        Timestamp value =
            Timestamp.newBuilder().setSeconds(TimeUtil.TIMESTAMP_SECONDS_MAX + 1).build();
        TimeUtil.toString(value);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      try {
        // Invalid nanos value.
        Timestamp value = Timestamp.newBuilder().setNanos(-1).build();
        TimeUtil.toString(value);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      try {
        // Invalid nanos value.
        Timestamp value = Timestamp.newBuilder().setNanos(1000000000).build();
        TimeUtil.toString(value);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      try {
        // Value to small.
        TimeUtil.parseTimestamp("0000-01-01T00:00:00Z");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Value to large.
        TimeUtil.parseTimestamp("10000-01-01T00:00:00Z");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Missing 'T'.
        TimeUtil.parseTimestamp("1970-01-01 00:00:00Z");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Missing 'Z'.
        TimeUtil.parseTimestamp("1970-01-01T00:00:00");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Invalid offset.
        TimeUtil.parseTimestamp("1970-01-01T00:00:00+0000");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Trailing text.
        TimeUtil.parseTimestamp("1970-01-01T00:00:00Z0");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Invalid nanosecond value.
        TimeUtil.parseTimestamp("1970-01-01T00:00:00.ABCZ");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
    }
  
    public void testDurationStringFormat() throws Exception {
      Timestamp start = TimeUtil.parseTimestamp("0001-01-01T00:00:00Z");
      Timestamp end = TimeUtil.parseTimestamp("9999-12-31T23:59:59.999999999Z");
      Duration duration = TimeUtil.distance(start, end);
      assertEquals("315537897599.999999999s", TimeUtil.toString(duration));
      duration = TimeUtil.distance(end, start);
      assertEquals("-315537897599.999999999s", TimeUtil.toString(duration));
  
      // Generated output should contain 3, 6, or 9 fractional digits.
      duration = Duration.newBuilder().setSeconds(1).build();
      assertEquals("1s", TimeUtil.toString(duration));
      duration = Duration.newBuilder().setNanos(10000000).build();
      assertEquals("0.010s", TimeUtil.toString(duration));
      duration = Duration.newBuilder().setNanos(10000).build();
      assertEquals("0.000010s", TimeUtil.toString(duration));
      duration = Duration.newBuilder().setNanos(10).build();
      assertEquals("0.000000010s", TimeUtil.toString(duration));
  
      // Parsing accepts an fractional digits as long as they fit into nano
      // precision.
      duration = TimeUtil.parseDuration("0.1s");
      assertEquals(100000000, duration.getNanos());
      duration = TimeUtil.parseDuration("0.0001s");
      assertEquals(100000, duration.getNanos());
      duration = TimeUtil.parseDuration("0.0000001s");
      assertEquals(100, duration.getNanos());
  
      // Duration must support range from -315,576,000,000s to +315576000000s
      // which includes negative values.
      duration = TimeUtil.parseDuration("315576000000.999999999s");
      assertEquals(315576000000L, duration.getSeconds());
      assertEquals(999999999, duration.getNanos());
      duration = TimeUtil.parseDuration("-315576000000.999999999s");
      assertEquals(-315576000000L, duration.getSeconds());
      assertEquals(-999999999, duration.getNanos());
    }
  
    public void testDurationInvalidFormat() throws Exception {
      try {
        // Value too small.
        Duration value = Duration.newBuilder().setSeconds(TimeUtil.DURATION_SECONDS_MIN - 1).build();
        TimeUtil.toString(value);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      try {
        // Value too large.
        Duration value = Duration.newBuilder().setSeconds(TimeUtil.DURATION_SECONDS_MAX + 1).build();
        TimeUtil.toString(value);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      try {
        // Invalid nanos value.
        Duration value = Duration.newBuilder().setSeconds(1).setNanos(-1).build();
        TimeUtil.toString(value);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      try {
        // Invalid nanos value.
        Duration value = Duration.newBuilder().setSeconds(-1).setNanos(1).build();
        TimeUtil.toString(value);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      try {
        // Value too small.
        TimeUtil.parseDuration("-315576000001s");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Value too large.
        TimeUtil.parseDuration("315576000001s");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Empty.
        TimeUtil.parseDuration("");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Missing "s".
        TimeUtil.parseDuration("0");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Invalid trailing data.
        TimeUtil.parseDuration("0s0");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
  
      try {
        // Invalid prefix.
        TimeUtil.parseDuration("--1s");
        Assert.fail("Exception is expected.");
      } catch (ParseException e) {
        // Expected.
      }
    }
  
    public void testTimestampConversion() throws Exception {
      Timestamp timestamp = TimeUtil.parseTimestamp("1970-01-01T00:00:01.111111111Z");
      assertEquals(1111111111, TimeUtil.toNanos(timestamp));
      assertEquals(1111111, TimeUtil.toMicros(timestamp));
      assertEquals(1111, TimeUtil.toMillis(timestamp));
      timestamp = TimeUtil.createTimestampFromNanos(1111111111);
      assertEquals("1970-01-01T00:00:01.111111111Z", TimeUtil.toString(timestamp));
      timestamp = TimeUtil.createTimestampFromMicros(1111111);
      assertEquals("1970-01-01T00:00:01.111111Z", TimeUtil.toString(timestamp));
      timestamp = TimeUtil.createTimestampFromMillis(1111);
      assertEquals("1970-01-01T00:00:01.111Z", TimeUtil.toString(timestamp));
  
      timestamp = TimeUtil.parseTimestamp("1969-12-31T23:59:59.111111111Z");
      assertEquals(-888888889, TimeUtil.toNanos(timestamp));
      assertEquals(-888889, TimeUtil.toMicros(timestamp));
      assertEquals(-889, TimeUtil.toMillis(timestamp));
      timestamp = TimeUtil.createTimestampFromNanos(-888888889);
      assertEquals("1969-12-31T23:59:59.111111111Z", TimeUtil.toString(timestamp));
      timestamp = TimeUtil.createTimestampFromMicros(-888889);
      assertEquals("1969-12-31T23:59:59.111111Z", TimeUtil.toString(timestamp));
      timestamp = TimeUtil.createTimestampFromMillis(-889);
      assertEquals("1969-12-31T23:59:59.111Z", TimeUtil.toString(timestamp));
    }
  
    public void testDurationConversion() throws Exception {
      Duration duration = TimeUtil.parseDuration("1.111111111s");
      assertEquals(1111111111, TimeUtil.toNanos(duration));
      assertEquals(1111111, TimeUtil.toMicros(duration));
      assertEquals(1111, TimeUtil.toMillis(duration));
      duration = TimeUtil.createDurationFromNanos(1111111111);
      assertEquals("1.111111111s", TimeUtil.toString(duration));
      duration = TimeUtil.createDurationFromMicros(1111111);
      assertEquals("1.111111s", TimeUtil.toString(duration));
      duration = TimeUtil.createDurationFromMillis(1111);
      assertEquals("1.111s", TimeUtil.toString(duration));
  
      duration = TimeUtil.parseDuration("-1.111111111s");
      assertEquals(-1111111111, TimeUtil.toNanos(duration));
      assertEquals(-1111111, TimeUtil.toMicros(duration));
      assertEquals(-1111, TimeUtil.toMillis(duration));
      duration = TimeUtil.createDurationFromNanos(-1111111111);
      assertEquals("-1.111111111s", TimeUtil.toString(duration));
      duration = TimeUtil.createDurationFromMicros(-1111111);
      assertEquals("-1.111111s", TimeUtil.toString(duration));
      duration = TimeUtil.createDurationFromMillis(-1111);
      assertEquals("-1.111s", TimeUtil.toString(duration));
    }
  
    public void testTimeOperations() throws Exception {
      Timestamp start = TimeUtil.parseTimestamp("0001-01-01T00:00:00Z");
      Timestamp end = TimeUtil.parseTimestamp("9999-12-31T23:59:59.999999999Z");
  
      Duration duration = TimeUtil.distance(start, end);
      assertEquals("315537897599.999999999s", TimeUtil.toString(duration));
      Timestamp value = TimeUtil.add(start, duration);
      assertEquals(end, value);
      value = TimeUtil.subtract(end, duration);
      assertEquals(start, value);
  
      duration = TimeUtil.distance(end, start);
      assertEquals("-315537897599.999999999s", TimeUtil.toString(duration));
      value = TimeUtil.add(end, duration);
      assertEquals(start, value);
      value = TimeUtil.subtract(start, duration);
      assertEquals(end, value);
  
      // Result is larger than Long.MAX_VALUE.
      try {
        duration = TimeUtil.parseDuration("315537897599.999999999s");
        duration = TimeUtil.multiply(duration, 315537897599.999999999);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      // Result is lesser than Long.MIN_VALUE.
      try {
        duration = TimeUtil.parseDuration("315537897599.999999999s");
        duration = TimeUtil.multiply(duration, -315537897599.999999999);
        Assert.fail("Exception is expected.");
      } catch (IllegalArgumentException e) {
        // Expected.
      }
  
      duration = TimeUtil.parseDuration("-1.125s");
      duration = TimeUtil.divide(duration, 2.0);
      assertEquals("-0.562500s", TimeUtil.toString(duration));
      duration = TimeUtil.multiply(duration, 2.0);
      assertEquals("-1.125s", TimeUtil.toString(duration));
  
      duration = TimeUtil.add(duration, duration);
      assertEquals("-2.250s", TimeUtil.toString(duration));
  
      duration = TimeUtil.subtract(duration, TimeUtil.parseDuration("-1s"));
      assertEquals("-1.250s", TimeUtil.toString(duration));
  
      // Multiplications (with results larger than Long.MAX_VALUE in nanoseconds).
      duration = TimeUtil.parseDuration("0.999999999s");
      assertEquals(
          "315575999684.424s", TimeUtil.toString(TimeUtil.multiply(duration, 315576000000L)));
      duration = TimeUtil.parseDuration("-0.999999999s");
      assertEquals(
          "-315575999684.424s", TimeUtil.toString(TimeUtil.multiply(duration, 315576000000L)));
      assertEquals(
          "315575999684.424s", TimeUtil.toString(TimeUtil.multiply(duration, -315576000000L)));
  
      // Divisions (with values larger than Long.MAX_VALUE in nanoseconds).
      Duration d1 = TimeUtil.parseDuration("315576000000s");
      Duration d2 = TimeUtil.subtract(d1, TimeUtil.createDurationFromNanos(1));
      assertEquals(1, TimeUtil.divide(d1, d2));
      assertEquals(0, TimeUtil.divide(d2, d1));
      assertEquals("0.000000001s", TimeUtil.toString(TimeUtil.remainder(d1, d2)));
      assertEquals("315575999999.999999999s", TimeUtil.toString(TimeUtil.remainder(d2, d1)));
  
      // Divisions involving negative values.
      //
      // (-5) / 2 = -2, remainder = -1
      d1 = TimeUtil.parseDuration("-5s");
      d2 = TimeUtil.parseDuration("2s");
      assertEquals(-2, TimeUtil.divide(d1, d2));
      assertEquals(-2, TimeUtil.divide(d1, 2).getSeconds());
      assertEquals(-1, TimeUtil.remainder(d1, d2).getSeconds());
      // (-5) / (-2) = 2, remainder = -1
      d1 = TimeUtil.parseDuration("-5s");
      d2 = TimeUtil.parseDuration("-2s");
      assertEquals(2, TimeUtil.divide(d1, d2));
      assertEquals(2, TimeUtil.divide(d1, -2).getSeconds());
      assertEquals(-1, TimeUtil.remainder(d1, d2).getSeconds());
      // 5 / (-2) = -2, remainder = 1
      d1 = TimeUtil.parseDuration("5s");
      d2 = TimeUtil.parseDuration("-2s");
      assertEquals(-2, TimeUtil.divide(d1, d2));
      assertEquals(-2, TimeUtil.divide(d1, -2).getSeconds());
      assertEquals(1, TimeUtil.remainder(d1, d2).getSeconds());
    }
  }
  